Dennis is right to caution. It is really up to you to weigh the pros and cons.
Hypothetical -- I have some family knowledge that is known only to me. I think it is important enough to be recorded for my descendants to know, but I don't want to tell them now, because it does not affect them directly. However, it might affect others who are living, so I don't want to publish it openly. So, because it is my own profile, and nobody else can see what I have there, I use the hide text code to record it for later release. This means that, should anything happen to me and I haven't had the opportunity to share what I know with my family, a future editor can remove the hide text code (or not, at their discretion, dependent on my instructions included with the hidden text (maybe it's to wait until x-relative has died, or something), so what I know is no longer private.
(Note - the above hypothetical would not work for me, because I have three people who are not me on my Trusted List. And any of the secrets I may wish told in the future might include one or more of those people, so I keep said secrets in my head.)